Hydraulic Cylinder Seal Kits fit Komatsu Excavator Boom Arm Bucket
High-performance hydraulic cylinder seal kits for Komatsu excavators. Designed to fit boom, arm, and bucket cylinders of models such as PC60, PC200, PC220, and PC300. Offers excellent resistance to wear, pressure, and oil leakage in demanding job conditions.
| Material | NBR/ PTFE/ ACM/ VMQ/ FKM/ HNBR/ EPDM/ Silicone and etc |
|---|---|
| Working Temperature | -40–120℃(according to the material) |
| Pressure | Up to 690bar(10000psi) |
| Hardness | 90-95 Shore A |
| Color | Black/Orange/Brown/White/Brown |
| MOQ | 12 Pieces |
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Kinton Parts is trusted by professionals worldwide for delivering high-quality parts for excavators, bulldozers, and other construction machinery—with guaranteed performance and durability.
Komatsu hydraulic cylinder seal kits are critical for maintaining efficient, leak-free operation of your excavator’s hydraulic system. Each kit includes seals and rings that match Komatsu OEM specifications, providing tight sealing for the cylinder rod and piston. Whether you're overhauling the arm, boom, or bucket cylinder, our seal kits restore optimal function.
Seal Kit Composition & Material Advantages
Each seal kit includes a full range of components made from premium materials for enhanced durability and pressure resistance:
- Dust seals – High-flexibility polyurethane, effective in blocking contaminants
- Rod seals – NBR or PU with excellent wear and oil resistance
- Piston seals – Designed for heavy-duty hydraulic pressure conditions
- Wear rings – PTFE or fabric-reinforced composite to reduce side load damage
- O-rings & back-up rings – NBR or FKM with strong chemical compatibility
All seals are precision-molded to OEM specs, ensuring reliable performance even in demanding excavation work.
Compatible Komatsu Models
Our seal kits are compatible with a wide range of Komatsu machines, including:
- PC60 / PC60-7 / PC100 / PC120
- PC200 / PC200-5 / PC200-6 / PC200-8
- PC220 / PC300 / PC400 / PC450
If you're unsure of the match, just provide us with your cylinder's part number or Komatsu model info.
Available Cylinder Kits
We supply seal kits for the following hydraulic cylinder positions:
- Boom Cylinder Seal Kit
- Arm Cylinder Seal Kit
- Bucket Cylinder Seal Kit
Each set contains all necessary components for a full rebuild, including wear rings, seals, and backup supports.
OEM Reference Part Numbers
Our seal kits support various OEM part numbers, including:
| Part Numbers | ||||||
|---|---|---|---|---|---|---|
| 207-63-X9010 | 207-63-X9040 | 207-63-X9050 | 707-98-38510 | 707-98-39610 | 707-98-46280 | 707-98-47670 |
| 707-98-47710 | 707-98-47720 | 707-98-47730 | 707-98-48610 | 707-98-58240 | 707-98-38600 | 707-99-37500 |
| 707-99-45230 | 707-99-46140 | 707-99-46600 | 707-99-47600 | 707-99-50520 | 707-99-57160 | 707-99-57180 |
| 707-99-58080 | 707-99-58090 | 707-99-58240 | 707-99-58260 | 707-99-58360 | 707-99-58370 | 707-99-67010 |
| 707-99-67090 | 707-99-67120 | 707-99-67280 | 707-99-68510 | 707-99-76030 | 707-99-78680 | 721-98-00510 |
| 721-98-00520 | 721-98-00610 | 707-99-65400 | PC200-7 Arm cylinder seal kit | 798-638-73 | ||
| PC200-7 Boom cylinder seal kit | PC200-7 Bucker cylinder seal kit | 798-637-73 | ||||
| PC200-8 Arm cylinder seal kit | PC200-8 Boom cylinder seal kit | 707-98-23870 | ||||
| PC200-8 Bucker cylinder seal kit | PC200-8 track adjuster seal kit | 707-98-14930 | ||||
| PC210NLC-7K Arm cylinder seal kit | PC210NLC-7K Boom cylinder seal kit | |||||
If you have your original part number or cylinder code, feel free to contact us for quick matching assistance.
Two Recommended Installation Methods
Installation Method 1: Mounting Pin & Hand Pressure
- Use the mounting pin to align the seal components inside the cylinder bore.
- Use a ballast tool, locating cone sleeve, and auxiliary pressure plate to gradually compress and install the seal components into the gland without damaging the material.
This method is suitable for standard seals with medium flexibility, and reduces the risk of tearing during installation.
Installation Method 2: PTFE & O-Ring Installation with Calibration
- O-Ring Installation
Lubricate and place each O-ring into its groove using specialized tools to avoid twisting or over-stretching. - PTFE Slip Ring Installation
Gently expand the PTFE ring using a heated mandrel or forming tool, then place it over the piston or gland.
Allow it to cool and reshape into its groove precisely. - Calibration
Use a calibration tool or press-fit tool to compress the installed seals uniformly and ensure correct fit and compression rate before cylinder reassembly.
This method is especially recommended for high-pressure or precision-fit PTFE seals and wear rings.
O ring installation
PTFE Slip Ring Install
Calibration
Both methods should be performed after lubrication of seals with hydraulic oil.
Key Advantages
- Perfect fit for Komatsu hydraulic cylinders
- Withstands high pressure and harsh working environments
- Reduces internal leakage and extends cylinder service life
- Ready-to-install kits with fast delivery
- Supports OEM and aftermarket needs
SHIPPING & DELIVERY
At Kinton Parts, we ensure reliable, worldwide shipping of parts for excavators, bulldozers, and a full range of construction machines—safe, fast, and secure.
All products are securely packed using high-quality export cartons, reinforced wooden cases, or industry-standard palletized packaging to ensure maximum protection during transit and smooth handling during unloading.
Standard orders are typically shipped within 3–5 working days, while large or customized orders are usually dispatched within 7–20 days, depending on volume and production requirements.
We offer flexible global shipping options, including:
- International sea freight for cost-effective bulk transport
- Air freight for urgent orders
- Courier delivery (DHL, FedEx, UPS) for small-volume or sample shipments
Our logistics team manages every shipment carefully, providing real-time updates and tracking information until your order arrives safely at your destination.
Need assistance choosing the best shipping method for your location and timeline? Contact our team — we’ll help you plan a smooth delivery experience.
FAQ
Q: What are your main products?
A: We supply a full range of undercarriage and wear parts for excavators, bulldozers, and other heavy equipment. Our product line includes: Track rollers, carrier rollers, front idlers, sprockets, segments, track shoes, track chains, bolt and nuts, pins and bushings, bucket teeth and adaptors, filters, seal kits, swing bearing, and hydraulic cylinder—plus other essential replacement parts.
Q: Which countries do you export to?
A: Kinton Parts exports to over 60 countries worldwide, including:
USA, Canada, UK, Germany, Russia, UAE, Indonesia, Malaysia, Thailand, India, Pakistan, Bangladesh, Sri Lanka, South Africa, Colombia, Peru, and many others.
Q: Can I order a sample?
A: Yes, we accept trial orders. For parts in stock, samples can be shipped quickly. If you have technical drawings or existing samples, we also support customized production and mold development.
Q: How can I track my order after shipping?
A: Once your order is shipped, we will provide you with all necessary tracking information based on the shipping method. For express deliveries, you’ll receive a tracking number to follow the shipment online. For air or sea freight, we’ll send you the relevant documents such as the airway bill (AWB) or bill of lading (B/L), along with the packing list and commercial invoice to help with tracking and customs clearance.
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Trusted by professionals worldwide, Kinton Parts supplies premium-quality components for excavators, bulldozers, and more—with reliable quality you can count on.
